Model for Calculating Idling of Nuclear Power Coolant Pump Considering Coolant Kinetic Energy in Pipeline
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摘要: 核主泵惰转惯量设计过小，一旦核电站全厂停电会造成核事故，而设计过大会极大地降低机组效率，因此惰转计算模型的准确性对于保证核电站安全和提高机组效率十分重要。本文考虑管路中冷却剂动能对反应堆冷却剂泵惰转过程的影响，通过启-停机过程中功率守恒方程和泵相似定律，推导并建立了考虑管路冷却剂影响的惰转瞬态计算模型，并给出了泵机组惰转惯量和惰转时间的简单计算公式，使计算结果更精确，工程适用范围更广泛，可应用于核工程和非核工程中惰转惯量的精准设计以及惰转时间的精准计算。Abstract: If the idling inertia of the nuclear main pump is designed too small, nuclear accident will be caused once the whole plant power failure occurs, and if the idling inertia is designed too large, the unit efficiency will be greatly reduced. Therefore, the accuracy of the idling calculation model is very important to ensure the safety of nuclear power plant and improve the unit efficiency. In this paper, the influence of coolant kinetic energy in the pipeline on the idling process of reactor coolant pump is considered. Through the power conservation equation and pump similarity law during start-up and shutdown, the idling transient calculation model considering the influence of pipeline coolant is deduced and established, and the simple calculation formulas of idling inertia and idling time of pump unit are given, which makes the calculation results more accurate and has a wider range of engineering application, and can be applied to the accurate design of idling inertia and the accurate calculation of idling time in nuclear and non-nuclear engineering.
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Key words:
- Idling /
- Idling time /
- Idling inertia /
- Nuclear main pump
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